At startup, the upper right kickout hole fires repeatedly and the game won't start.
I was doing a simple repair on my Firepower. I was replacing white flippers with yellow boots. Everything went fine, but the flipper boot was not returning to the proper rest position. It seemed like the return spring wasn't powerful enough. I thought maybe the sleeve was gummed up so I decided to check. I didn't feel like taking everything apart, so I unscrewed the bracket guiding the plunger into the coil and pulled everything apart. I cleaned the sleeve (wasn't that dirty) and stretched the spring to give it some more power. When I reinstalled the flipper didn't work. It tried to pull the plunger in, but wasn't powerful enough. I thought perhaps I stretched the spring so much it was too powerful (though this seemed silly). I also noticed some of the wires soldered to the coil were fraying a bit. I resoldered and reinstalled, but then the game wouldn't start and the upper right coil would fire repeatedly. If I engage the connection which I believe is for the lane change attached to the end of stroke, the left kickout will fire alternately with the right kickout. If I depress the ball drain switch, a game will start, but there is crazy scoring happening and it won't send a ball to the plunger. If the ball (after i manually kick it out) touches the right slingshot, it causes the game to end. I resoldered all of the flipper coil connections and installed a new spring. The flipper now works.
This all seems pretty weird to me. I am thinking perhaps I shorted something when I was soldering or messing with the flipper coil. I would turn the machine on to test, and sometimes would forget to turn it off when i went back to make changes or adjustments. Perhaps I touched two points that shouldn't have been touched with the machine on? I have a new rottendog board installed. i don't see any fuses tripped or anything burned on the boards?
What could have caused this? How should I fix it? PLease HELP!